Velleman EVM439 - Manual (Page 5)

EVM439
00 (30/09/2008) 5
• The thermometer can be used in either °C or °F mode. To switch between modes,
press the Mode key (2) while the unit is on. The °C or °F symbol will appear on
the display (1).
• The maximum measured value is always shown at the bottom of the display
(1), next to the MAX icon.
• The hold mode is automatically activated when the Meas. key (6) is released.
The last measurement will remain on the display (1) until a new measurement is
started, or the device shuts off automatically (after approx. 15 sec.).
• Note that the backlight is always on, while the laser is only on during
measurement.
6. Troubleshooting
‘Hi’ or ’Lo’ is displayed when the temperature being measured is
outside of the range of the instrument (see technical
specifications).
‘Er2’ is displayed when the thermometer is exposed to rapid
changes in ambient temperature. Let the thermometer stabilize to
the working/room temperature for at least 30 minutes.
‘Er3’ is displayed when the ambient temperature exceeds 0°C
(+32°F) or +50°C (+122°F). Let the thermometer stabilize to the
working/room temperature for at least 30 minutes.
Error 5~9, for all other error messages it is necessary to reset the
thermometer. To reset it, wait until the instrument off, remove the
batteries and wait for at least one minute. Reinsert the batteries
and switch on. If the error message remains please contact the
Service Department for further assistance.
7. Cleaning and storage
• The sensor lens is the most delicate part of the thermometer and should be
kept clean at all times.
• To do this, only use a soft cloth or cotton bud with a little water or medical
alcohol.
• Allow the lens to fully dry before using the thermometer.
• Wipe the other parts of the thermometer regularly with a moist, lint-free cloth. Do
not use alcohol or solvents.
• Do not submerge the thermometer in water or any other liquid.
• There are no user-serviceable parts.
• Contact your dealer for spare parts if necessary.
• The thermometer should be stored between –20°C to +65°C (-4°F to +149 °F).